#include <stdio.h>

#define NUM_MIN 1
#define NUM_MAX 100

int Sum(int s, int e)
{
  int result = 0;
  for(int i = s; i <= e; i++)
  {
    result += i;
  }

  return result;
}


int main()
{
  int start = NUM_MIN;
  int end = NUM_MAX;
  printf("I'll begin\n");
  int n = Sum(start, end);
  printf("running done, result is:[%d-%d]=%d\n", start, end, n);
  return 0;
}
